import React,{ Component } from "react";
import ReactDOM from "react-dom"

export default class Hello extends Component{
  

    
    render() {
       
        return (
            <div>
               
                <h3>
                    Hello 组件
                </h3>
            </div>
        )
    }
}

// export default function Hello() {
  

//     return (
//         <div>
          
//         </div>
//     )
// }